Underwater robot



FIG. 1 is a front view of an underwater robot showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a perspective view thereof.

The broken lines shown in the figures depict portions of the underwater robot that form no part of the claimed design. 

CLAIM The ornamental design for an underwater robot, as shown and described. 